For Batman: Arkham Knight fans, the "Season of Infamy: Most Wanted" DLC is available as of today.

In honor of the release, Warner Bros. and Rocksteady Studios released a new trailer highlighting the DLC's content, including four new missions involving infamous Batman supervillains Mad Hatter, Killer Croc, Ra's Al Ghul and Mr. Freeze.

The new trailer teases some of the content players who purchase the DLC (or have acquired it via the game's season pass) can expect.

First, Batman has to work his way through Mad Hatter's crazy mind games in the "Wonderland" mission. Then the Caped Crusader, along with Nightwing, must investigate the crash of an airship prison containing Killer Croc in "Beneath the Surface." In "Shadow War," Batman must face Ra's Al Ghul as the League of Assassins restore him to full health (this mission occurs shortly after events of Batman: Arkham City). Finally, Mr. Freeze returns to Gotham City in "In From The Cold," and must help Scarecrow and the Militia — who have his wife — destroy Batman.

The new expansion also comes with a few new challenges and skins, including the 2008 Batsuit from The Dark Knight film and the original Arkham Asylum Batmobile. There's also a Harley Quinn skin for those players who own the Harley Quinn story pack or crime fighter challenge pack #5.

Batman: Arkham Knight released in September and received relatively good reviews on consoles, but the title got blasted for its PC release, which came so loaded with bugs and glitches that Warner Bros. offered refunds to those who purchased the game on that platform and pulled it from sale until they could fix the problems.

"We want to apologize to those of you who are experiencing performance issues with Batman: Arkham Knight on PC," wrote Warner Bros. on the official game site. "We take these issues very seriously and have therefore decided to suspend future game sales of the PC version while we work to address these issues to satisfy our quality standards. We greatly value our customers and know that while there are a significant amount of players who are enjoying the game on PC, we want to do whatever we can to make the experience better for PC players overall."

The game did not go back on sale until late October, at which time the developers also released a patch for those who already purchased the title.

Batman: Arkham Knight - Season of Infamy: Most Wanted is now available on PC, PlayStation 4 and Xbox One.